Win7 Freezing up and Crashing using 2 HD7790 2gb OC

[Zenphos]

i have bought 1 HD 7790 2gb OC and it started to freeze up win7 permanently requiring a reset to continue working, when i received a second 7790 2gb OC and used it along with the other 7790 it kept on crashing, i have tried different versions of the graphics driver and other fixes but to no avail and i was wondering if anyone else is encountering this problem.

 

[popatim]

Did you ever bother to try the new one singly, Ie - the old one removed to see if thats the source of your problem

 

[Zenphos]

ive tried both cards singly and they are both causing windows to crash, so i started to assume it was a general problem with that card.